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Stack of quasi-mosaic thin lamellae as a diffracting element for Laue lenses

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Abstract

Crystals with curved diffracting planes have been investigated as high-efficiency optical components for the realization of a Laue lens for satellite-borne experiments in astrophysics. Curved crystals implementing the quasi-mosaic effect, namely an effect of crystalline anisotropy, are able to focus an X-ray beam to a size far smaller than that of the diffracting element, in turn increasing the focusing power of a Laue lens. This work provides first results about the feasibility of a self-standing stack composed of quasi-mosaic crystals. Stacking of crystalline lamellae is a solution to overcome the thickness limitation in existing self-standing quasi-mosaic crystals. Ten thin silicon crystalline lamellae were stacked, and then the planes affected by the quasi-mosaic effect were tested by polychromatic X-ray diffraction. The multicrystal behaved as one diffracting element, yielding a broad and smooth diffraction profile. The effective realization of a quasi-mosaic multicrystal opens up the prospective of building a Laue lens with a large integrated reflectivity, which leads to a high sensitivity, a necessary condition for the observation of celestial X-ray sources via a Laue lens.

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Notes

  1. 1 Here we adopted the vocabulary definition of convexity.

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Acknowledgments

The authors are thankful to INFN for financial support through the LOGOS project.

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Authors and Affiliations

  1. Department of Physics and Earth Sciences, INFN, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy

    Valerio Bellucci, Riccardo Camattari & Vincenzo Guidi

  2. National Institute of Optics CNR-INO Sensor Lab, Via Branze 45 - 25123, Brescia, Italy

    Valerio Bellucci, Riccardo Camattari & Vincenzo Guidi

  3. INFN Section of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy

    Valerio Bellucci & Vincenzo Guidi

  4. Laboratoire de Spectrométrie Physique (CNRS UMR 5588), Université Joseph Fourier, BP 87, St Martin d’Hères Cedex, 38402, France

    Pierre Bastie

  5. ILL-Institut Laue Langevin, 71 Avenue des Martyrs, 38000, Grenoble, France

    Pierre Bastie

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  1. Valerio Bellucci
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  2. Riccardo Camattari
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  3. Vincenzo Guidi
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  4. Pierre Bastie
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Correspondence to Vincenzo Guidi.

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Bellucci, V., Camattari, R., Guidi, V. et al. Stack of quasi-mosaic thin lamellae as a diffracting element for Laue lenses. Exp Astron 38, 25–40 (2014). https://doi.org/10.1007/s10686-014-9391-4

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  • DOI: https://doi.org/10.1007/s10686-014-9391-4

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